“Scott and I are thrilled to add a little boy to the bunch!” the mom-to-be, 30, tellsE! News. “A boy is definitely needed in this family.”

Her sister, Khloe Kardashianis excited about the news. She told Us it was tough to buy baby gifts since they didn’t know the baby’s sex. “We can only buy neutrals,” she told Us. “When we know if it’s a boy or a girl, I can buy more cute things.”

In August, Kourtney revealed she was pregnant. At first, she kept the father’s identity secret then later revealed that the father was Scott, her ex-boyfriend

Kourtney tells US, “We’ll see,” when asked about getting married while Scott says they have a lot on their plate.

“We’re home every night looking at baby books and baby magazines,” he told Us. “I just want to stay home with her, enjoy her company, look at her stomach and be with her.”

Yesterday, we reported that Kourtney Kardashian is pregnant but didn’t reveal the identity of her baby’s father. However, in an interview with The Today Show, she reveals that ex-boyfriend Scott Disick is the father.

Both Kourtney and Scott were engaged but called it quits in February. According to USmagazine, Kim Kardashian can’t wait to be an aunt.

“Everyone is so excited for this new journey in our life,” Kim, 28, told Us. “It’s the first addition to the Kardashian clan, and we only wish that our dad could be here and experience this with us,” Kim went on. Her father, Robert Kardashian, a prominent lawyer who defended O.J. Simpson, died of esophageal cancer in September 2003.

UPDATE : According to Kourtney, Scott is very excited about the news – “He’s very excited. When I found out, I was so shocked. I didn’t know what to do. He was so for it and so excited from the beginning. And we’re really happy.”

When asked about marriage, Kourtney — who is due in December — said, “We’ll see.”